Nicholas brayer



2 SheetsSheet 1.

(No Model.)

N. BRAYER.

HOT AIR FURNACE.

Patented Jan. 1 1889.

I Ivan/P1701507.

' his iiarneya.

VF ll-nve/sses.

2 Sheets-Sheet 2.

N. BRAYER,

HOT AIR FURNACE.

Patented Jan. 1, 1889.

Ivan/e 72/15 0 r.

? 1 728 flttarney g,

N PETERS. Phuloiilhcgmpher. wilshiflglnm D. C.

(No Model.)

Witnesses.

NICHOLAS :ISRAYER, OF ROCI'IES'IER, NE YORK, ASSIGNOR TO THE CO- OPERATIVE FOFNDRY COMPANY, OF SAME PLACE.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 395,420, dated January 1, 1889.

Application filed May 16, 1888. Serial No. 274,067. (No model.)

To all 107mm 7'25 may concern:

Be it known that I, NICHOLAS BRAYER, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Hot-Air Furnaces; and I do hereby declare the following to be a full, clear, and exact (I scription of the same, reference being had to the accompanying draw in gs, if orming a part of this specification, and to the figures and letters of reference marked thereon.

My present in vention relates to hot-air furnaces, and has for its object to improve and simplify their construct-ion, more particularly that of the radiating-ehamber, and provide a suitable exit-flue for the smoke and products, though equally well, adapted for use in a hotairchaml'ier into which the smoke and products do not come; and to this end it consists in certain novelties of construction and combinations of parts, all as will be hereinafter more fully described, and the novel features pointed out particularly in the claims at the end of this specification.

In the drawings, Figure l is a i)erspectivc view of a furnace constructed in accordance with my invention. Fig. is a vertical sectional view; Fig. 33, a section taken on the line :1: .c of l ig. 2; Fig. l, a top plan view of one of the sections; Fig. 5,21 sectional view of a modification; Fig. (i, a top plan view of the lower section thereof, and Fig. 7 a view oi the line plate or section removed.

Similar letters of rcli'erencc in the several figi'ircs denote similar parts.

The general co]lstruction ol' the furnace as a whole is about the same as that ol' the ordi nary hot-air .t'urnaccthat is to say, it is made up of superposed sections A, B, (T, l'), and E, having sealed joints l)(.l \'\'(?(ll them formed by construe ing each succeeding section below with a groove, (i, into which the plain lower edge, 71, of the sect ion above enters, this groove then being filled wii h suitable packing matcrial, such as sand.

The sections B, I), and E are eonstructml very slightly dillirrent [from the ordinary, the lower one forming the ash-pit provided with a suitable opening and a door, E, the next, 1), forming the lircmt and slightly contracted at the top For a purpose to be explained; the next'onc, t, containing the Fuel-supply orifice and closed by a door, C; the next, B,

forming a portion of the hotair or combus tion chamber, a portion, 1%,ot. the exit-pipe being formed at the rear, while the upper most one, A, forms the top. of the chamber and of the furnace, and contains the more important features of the present invention. This section A is providcal at its bottom wilh the usual edge, b, resting in the groove a in section l3, preferably rounded, as shown, and has formed in the rear side and extending from about the apex to the lower edge arecess or channel, F, forming a portion of the exi fine for the smoke and products. At the lower portion this recess continued out at the rear, at which point a collar or flange is formed for the attachment of the furnacecasing, as ordinarily, and For the smoke-pipe, the lower portion of the line, where it extends outward, being formed on the section ii, as shown in Figs. 2 and 23.

The exit-dine is formed by the covering or flue-plate G, applied to the inside of section A over channel F and extending from near the top to the portion 13 and cooperating therewith, when in place, to form a continuous passage from the center of the chamber to the smoke-pipe. It will be noted that this plan of forming a portion ol the tine in the top section and providing an internal covcring-plate, or even in dispensing the recess in the section, though I prefer to employ it, is an advantageous one, as it allows the formation of a flue entirely within the main furnacc, having no joints requiring pilfilv'lllg' and requiring no coring in casting.

As perhaps the most convenient mannerol' holding the plate (1} in position and materi allysimplityingconsi ructioml locate on either side the recess F in section A near the top two overhanging lugs or projections, c, with which ztrearrangml to co-operate corresponding lugs, (1, formed on the plate (i, so that when the plate is inserted and the lugs are engaged the plate will be securely held. Of course it will be understood that su ita ble gains are formed at the edges of recess F, with which the edges of plate (1 co-operate to form a reasonably-tight joint.

The plate G might be held in position by any means when the lugs are engaged; but I preferto construct the section 13, as described, with the portion :1, into which the lower edge of the plate projects, not only completing the flue, but this portion also serves to support the plate when in place. The joint here formed may be the same as the others-that is, of the tongue-and-groove formor may consist of the ordii'iary half groove or gain and plain-edged plate; but this matter of detail is unimportant.

Instead of extending the portion l3 as far into the combustion-chamber as in Figs. 1, 2, and 3, I may, and in some instances do, continue the groove formed in. the top of section B around in circular form, as in Fig. 6, form the lower half of the end 13 of the exitflue on the outside, and let the lower end of plate G enter the groove to form the joint, as shown in, Figs. 5 and (i. This form has the desirable feature of dispensing with the inward proj ection of the portion 13, thus enabling me to cast section l more readily and the employment of a more simple pattern.

In the top of section A is suspended the de- Hector H by means of a suitable link, 72., eyes being formed in the section and deflector, respectively, for its reception. A portion of the deflector is cut away at one side for the passage formed by plate G, as shown, and its obj ect is to prevent direct passage of the smoke and products to the exit, throwing them out against the sides, and thus increasing the heat therein.

As before stated, the lire-pot section is contracted near the top and, it will be noted, forms a larger gratesurt'ace, and also an extended surface at the sides, with which air can come in contact, while the tendency of the heated air being to rise in straight lines will cause this to be intei'lsely heated.

The feature of having the downward passage and deflector is desirable, in that it permits of amore extended passage for the smoke and in'oducts, and also the exit, being low, permits the more ready application of the smoke-pipe and manipulation of the directdraftdamper, if one is employed, besides t'acilitating construetimi.

If desired, the channel l might be dispensed with and the plate co-operate di rcctl y with the side of portion A; but in this event the plate G might have to be made too deep, besides which the cost of forming the channel is comparatively tri tlin The advantages of the arrangement shown as a whole are cheapness of construction, efliciency in operation, as a more extended heating-surfaee is providml, and facility in setting the furnace up and taking it down, combined with the readiness with which any of the parts can be replaced by new ones when burned out or broken. This latter is particularly true of the plate G, which is liable to be burned out by reason of the heat to which it is subjected, warping being prevented in a measure, as both sides of it are heated evenly or nearly so.

It will be understood that in use the ordinary sheet metal or other suitable casing is located around the furnace.

Various modifications of the device can be made by those skilled in the art without departing from the spirit of my invention; and I therefore do not desire to be confined to the arrangements shown.

I claim as my invention-- 1. In a furnace constructed in sections, substantially as described, the combination, with the upper section, of the plate co-operating with the inside wall thereof and forming a passage communicating with the upper portion, and the succeeding lower section arranged to support said plate when in position, as set forth. I

2. In a furnace constructed of superposed sections, the combination, with the top section, of the plate located on the inside thereof and co-operating with the side wall to form a passage communicating with the interior at the top, the interlocking lugs forming a connecting means, and the next lower section forming the support for the lower end of the plate, substantially as described.

3. In a furnace constructed of superposed sections, the combination, with the top section, of the plate located on the inside thereof and co-operating with the side wall to form a passage communicating with the interior at the upper portion, and meanssuch as inter locking lugsconnecting the plate and section and the next lower section having a portion of. the exit-passage formed therein with which the end of the plate co-operates to form a continuation. of the passage, substantially as described.

at. The combination, with the upper section having a portion of the exit-flue formed at the lower side thereof, of the plate located on the inside and eo-operating with the side wall to form a passage connnunicating with the interior at the upper portion, means such as interlocking lugs-for connecting the plate and section, and the lower section having a portion of the exit-line formed thereon adapted to co-operate with that 011 the upper section, and with which the lower portion of the plate also eo-operates, substantially as described.

5. In a furnace, the combination, with the upper section having the lower portion, of the exit-f1 ue formed thereon, and the plate removably secured therein and co-operatin g with the side wall to form a passage opening into the chamber near the top of the next succeeding section, having the groove in its upper side, with which the lower side of the upper section and the end of the plate co-operates to form a joint, and having also a portion of the eXitpassage formed thereon, also grooved to cooperate with the edge of the corresponding portion on the upper section, substantially as described.

NICHOLAS BRAYER.

Vi tnesses:

FRED F. CHURCH, GE B. SELDEN.

IIO 

